Class: HighLine::Terminal

Inherits:
Object
  • Object
show all
Defined in:
lib/xolo/admin/highline_terminal.rb

Instance Method Summary collapse

Instance Method Details

#readline_read(question) ⇒ Object

MonkeyPatch HighLine::Terminal#readline_read so that Readline lines can be case-insensitive, and have a prompt.

To use a prompt, put it in the environtment variable ‘XADM_HIGHLINE_READLINE_PROMPT’

To make the readline completion case-insensitive, set the environment variable XADM_HIGHLINE_READLINE_CASE_INSENSITIVE to anything.

This really only modifies the Regexp used for the completion_proc to make it case insensitive if desired (adding an ‘i’ to the end) and sets the prompt when calling Readline.readline

Use readline to read one line

Parameters:

  • question (HighLine::Question) —

    question from where to get autocomplete candidate strings



24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
 
# File 'lib/xolo/admin/highline_terminal.rb', line 24

def readline_read(question)
  # prep auto-completion
  unless question.selection.empty?
    Readline.completion_proc = lambda do |str|
      regex = ENV['XADM_HIGHLINE_READLINE_CASE_INSENSITIVE'] ? /\A#{Regexp.escape(str)}/i : /\A#{Regexp.escape(str)}/
      question.selection.grep(regex)
    end
  end

  # work-around ugly readline() warnings
  old_verbose = $VERBOSE
  $VERBOSE    = nil

  raw_answer  = run_preserving_stty do
    Readline.readline(ENV['XADM_HIGHLINE_READLINE_PROMPT'].to_s, true)
  end

  $VERBOSE = old_verbose

  raw_answer
end